<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card class="box-card">
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input
            placeholder="请输入内容"
            v-model="queryInfo.query"
            clearable
            @clear="getUserList"
          >
            <el-button
              slot="append"
              icon="el-icon-search"
              @click="getUserList"
            ></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
        </el-col>
      </el-row>

      <!-- 用户列表区域 -->
      <el-table :data="userlist" border :stripe="true">
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="姓名" prop="username"></el-table-column>
        <el-table-column label="邮箱" prop="email"></el-table-column>
        <el-table-column label="电话" prop="mobile"></el-table-column>
        <el-table-column label="角色" prop="role_name"></el-table-column>
        <el-table-column label="状态">
          <template slot-scope="scope">
            <el-switch
              v-model="scope.row.mg_state"
              @change="userStateChanged(scope.row)"
            >
            </el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="180px">
          <template slot-scope="scope">
            <!-- 修改按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
            ></el-button>
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeUserById(scope.row.id)"
            ></el-button>
            <!-- 分配角色按钮 -->
            <el-tooltip
              effect="dark"
              content="分配角色"
              placement="top"
              :enterable="false"
            >
              <el-button
                type="warning"
                icon="el-icon-setting"
                size="mini"
                @click="setRole(scope.row)"
              ></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区 -->
      <span>
        <el-form :model="addForm" :rules="addFormRules" ref="addFromRef" label-width="70px">
          <el-form-item label="用户名" prop="username">
            <el-input v-model="addForm.username"></el-input>
          </el-form-item>
          <el-form-item label="密码" prop="password">
            <el-input v-model="addForm.password"></el-input>
          </el-form-item>
          <el-form-item label="邮箱" prop="email">
            <el-input v-model="addForm.email"></el-input>
          </el-form-item>
          <el-form-item label="手机" prop="mobile">
            <el-input v-model="addForm.mobile"></el-input>
          </el-form-item>
        </el-form>
      </span>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

<!-- 修改用户对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClose">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px" >
        <el-form-item label="用户名" >
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
      </el-form>
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px" >
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email" ></el-input>
        </el-form-item>
      </el-form>
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px" >
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="editForm.mobile" ></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色的对话框 -->
        <el-dialog
            title="分配角色对话框"
            :visible.sync="setRoleDialogVisible"
            width="50%"
            @close="setRoleDialogClosed">
            <div>
              <p>当前的用户：{{userInfo.username}}</p>
              <p>当前的角色：{{userInfo.role_name}}</p>
              <p>分配新角色：
                <el-select v-model="selectedRoleId" placeholder="请选择">
                  <el-option
                    v-for="item in rolesList"
                    :key="item.id"
                    :label="item.roleName"
                    :value="item.id">
                  </el-option>
                </el-select>
              </p>
            </div>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    //  验证邮箱的规则
    var checkEmail = (rule,value,cb)=>{
      // 验证邮箱的正则表达式
      const regEmail= /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/
      
      if(regEmail.test(value)){
        //合法的邮箱
        return cb()
      }
      cb(new Error('请输入合法的邮箱'))
    }

    // 验证手机号的规则
    var checkMobile = (rule,value,cb)=>{
      // 验证手机号的正则表达式
        const regMobile = /^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/

        if(regMobile.test(value)){
        // 合法的手机号
        return cb()
        }
        cb(new Error('请输入合法的手机号'))
    }
    return {
      //获取用户列表的参数对象
      queryInfo: {
        query: "",
        //当前的页数
        pagenum: 1,
        //当前每页显示多少条数据
        pagesize: 2,
      },
      userlist: [],
      total: 0,
      //控制添加用户对话框的显示和隐藏
      addDialogVisible: false,
      // 添加用户的表单数据
      addForm:{
        username:"",
        password:"",
        email:"",
        mobile:""
      },
      // 添加表单的验证规则对象
      addFormRules:{
        username:[{required:true,message:'请输入用户名',trigger:'blur'},
                 {min:3,max:10,message:'用户名的长度在3~10个字符之间',trigger:'blur'}],
        password:[{required:true,message:'请输入密码',trigger:'blur'},
                 {min:6,max:15,message:'密码的长度在6~15个字符之间',trigger:'blur'}],
        email:[{required:true,message:'请输入用户邮箱',trigger:'blur'},
              {validator:checkEmail,trigger:'blur'}],
        mobile:[{required:true,message:'请输入用户手机号',trigger:'blur'},
                {validator:checkMobile,trigger:'blur'}],
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible:false,
      // 查询到的用户信息对象
      editForm:{},
      // 修改表单的验证规则对象
      editFormRules:{
        email:[{required:true,message:'请输入用户邮箱',trigger:'blur'},
              {validator:checkEmail,trigger:'blur'}],
        mobile:[{required:true,message:'请输入用户手机号',trigger:'blur'},
                {validator:checkMobile,trigger:'blur'}],
      },
      // 控制角色对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 需要分配角色的用户信息
      userInfo:{},
      // 所有角色的数据列表
      rolesList:[],
      // 已选中的角色Id值
      selectedRoleId:''
      
    };
  },
  created() {
    this.getUserList();
  },
  methods: {
    async getUserList() {
      const { data: res } = await this.$http.get("users", {
        params: this.queryInfo,
      });
      if (res.meta.status != 200) {
        return this.$message.error("获取用户列表失败");
      }
      this.userlist = res.data.users;
      this.total = res.data.total;
      console.log(res);
    },
    // 监听pagesize改变的时事件
    handleSizeChange(newSize) {
      console.log(newSize);
      this.queryInfo.pagesize = newSize;
      // 改变一次重新请求
      this.getUserList();
    },
    // 监听 页码值 改变的事件
    handleCurrentChange(newPage) {
      console.log(newPage);
      this.queryInfo.pagenum = newPage;
      this.getUserList();
    },
    // 监听 switch 状态的改变
    async userStateChanged(userinfo) {
      const { data: res } = await this.$http.put(
        `users/${userinfo.id}/state/${userinfo.mg_state}`
      );
      if (res.meta.status != 200) {
        userinfo.mg_state = !userinfo.mg_state;
        return this.$message.error("更新用户状态失败");
      }
      this.$message.success("更新用户状态成功");
    },
    // 监听用户对话框的关闭事件
    addDialogClosed(){
        this.$refs.addFromRef.resetFields()
    },
    // 点击按钮添加新用户
    addUser(){
      this.$refs.addFromRef.validate(async valid =>{
        if(!valid)return
          // 可以发起添加新用户的网络请求
          const {data:res} = await this.$http.post('/users',this.addForm)
        
        if(res.meta.status != 201){
          this.$message.error("添加用户失败！")
        }
        this.$message.success("添加用户成功！")
        // 隐藏添加的用户对话框
        this.addDialogVisible = false
        //重新获取用户列表数据
        this.getUserList()
      })
    },
    //展示编辑用户的对话框
    async showEditDialog(id){
      const {data:res} = await this.$http.get('users/'+id)

      if(res.meta.status != 200){
        return this.$message.error("查询用户信息失败！")
      }
      this.editForm = res.data
      this.editDialogVisible= true
    },
    // 监听修改用户对话框的关闭事件
    editDialogClose(){
      // 表单重置
      this.$refs.editFormRef.resetFields()
      
    },
    // 修改用户信息并提交
    editUserInfo(){
      // 表单验证
      this.$refs.editFormRef.validate(async valid=>{
        if(!valid)return
        // 发起修改用户信息的数据请求
        const {data:res} = await this.$http.put('users/'+this.editForm.id,{
          email:this.editForm.email,
          mobile:this.editForm.mobile
        })

      if(res.meta.status != 200){
        return this.$message.error("更新用户信息失败！")
      }
      // 请求成功之后关闭对话框
      this.editDialogVisible = false
      //刷新数据列表
      this.getUserList()
       //提示修改成功
        this.$message.success("更新用户信息成功！")


      })
    },
    // 根据id值来删除对应的信息
    async removeUserById(id){
      // 询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        // 如果用户确认删除，则返回值为字符串  confirm
        // 如果用户取消删除，则返回值为字符串  cancel
        if(confirmResult != 'confirm'){
          return this.$message.info('已取消删除')
        }
        const {data:res} = await this.$http.delete('users/'+id)

        if(res.meta.status != 200){
          return this.$message.error("删除用户失败！")
        }
        this.$message.success("删除用户成功！")
        this.getUserList()
    },
    // 展示分配角色的对话框
    async setRole(userinfo){
      this.userInfo = userinfo

      // 在展示对话框之前，获取所有角色的列表
      const {data:res} = await this.$http.get('roles')
      if(res.meta.status != 200){
        return this.$message.error("获取角色列表失败！")
      }
      this.rolesList = res.data

      this.setRoleDialogVisible = true
    },
    // 点击按钮分配角色
    async saveRoleInfo(){
      if(!this.selectedRoleId){
        return this.$message.error('请选择要分配的角色')
      }
      const {data:res} = await this.$http.put(`users/${this.userInfo.id}/role`,
      {
        rid:this.selectedRoleId
      })
      if(res.meta.status != 200){
        this.$message.error('更新角色失败！')
      }
      this.$message.success('更新角色成功！')
      this.getUserList()
      this.setRoleDialogVisible = false
    },
    setRoleDialogClosed(){
      // 监听分配角色对话框的关闭事件
      this.selectedRoleId = ''
      this.userInfo = {}
    }
  },
};
</script>

<style scoped>
.el-table {
  margin-top: 15px;
}
.el-pagination {
  margin-top: 15px;
}
</style>